WO2020202631A1 - 押圧センサの配置構造及び電子機器 - Google Patents

押圧センサの配置構造及び電子機器 Download PDF

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Publication number
WO2020202631A1
WO2020202631A1 PCT/JP2019/044798 JP2019044798W WO2020202631A1 WO 2020202631 A1 WO2020202631 A1 WO 2020202631A1 JP 2019044798 W JP2019044798 W JP 2019044798W WO 2020202631 A1 WO2020202631 A1 WO 2020202631A1
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WIPO (PCT)
Prior art keywords
region
pressing sensor
pressing
housing
slit
Prior art date
Application number
PCT/JP2019/044798
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English (en)
French (fr)
Japanese (ja)
Inventor
尚志 木原
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to CN201980052251.5A priority Critical patent/CN112534229B/zh
Priority to JP2020517606A priority patent/JP6737426B1/ja
Priority to US16/922,342 priority patent/US11930712B2/en
Publication of WO2020202631A1 publication Critical patent/WO2020202631A1/ja

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
    • H10N30/302—Sensors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/857—Macromolecular compositions
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/88—Mounts; Supports; Enclosures; Casings

Definitions

  • the present invention relates to an electronic device having a pressing sensor arrangement structure and a pressing sensor arrangement structure.
  • Patent Document 1 discloses a sensor used for a bathtub type housing.
  • the sensor detects deformation of the housing when a specific area on the side surface of the housing receives a pressing operation.
  • FIG. 9 is a diagram for explaining the arrangement structure of the pressing sensor according to the prior art.
  • the sensor described in Patent Document 1 is arranged on the side surface of the housing as shown in FIG.
  • the side surface of the housing is thinly formed, the area where the sensor can be arranged becomes small. If the area of the sensor becomes small, the output of the sensor may decrease. Further, since the adhesive area of the sensor to the housing is small, the adhesiveness of the sensor to the housing may be lowered.
  • an object of the present invention is to provide an electronic device having a housing having a thin side surface, an arrangement structure of a pressing sensor capable of detecting deformation of the housing when the side surface of the housing receives a pressing operation, and the electronic device. To do.
  • the arrangement structure of the pressing sensor according to the present invention is an arrangement structure of the pressing sensor with respect to the housing of the electronic device, and the housing is relatively displaced when the pressing operation is received and the side surface that receives the pressing operation.
  • a bottom surface having a first region that is easy to move and a second region that is relatively hard to displace from the first region is provided, and the pressing sensor is arranged so as to straddle the first region and the second region. It is characterized by being done.
  • the first region is displaced more than the second region in the direction away from the side surface of the housing.
  • the displacement of the second region in the direction away from the side surface of the housing is smaller than that of the first region.
  • the pressing sensor arranged over the first region and the second region causes shear distortion.
  • the pressing sensor can detect the signal generated by the shear distortion.
  • FIG. 1A is a perspective view of the electronic device according to the first embodiment
  • FIG. 1B is a sectional view thereof.
  • FIG. 1C is another example of the cross-sectional view shown in FIG. 1B.
  • FIG. 2A is a diagram for explaining the arrangement structure of the pressing sensor according to the first embodiment.
  • FIG. 2B is a partially enlarged plan view of FIG. 2A.
  • FIG. 3 is a diagram for explaining the displacement of the pressing sensor according to the first embodiment.
  • FIG. 4A is a cross-sectional view of the pressing sensor according to the first embodiment.
  • FIG. 4B is a diagram for explaining the piezoelectric film according to the first embodiment.
  • FIG. 5 is a diagram showing a simulation result of deformation of the housing and each pressing sensor when the side surface of the housing according to the first embodiment receives a pressing operation.
  • 6 (A) to 6 (C) are views for explaining a modified example of the arrangement structure of the pressing sensor according to the first embodiment.
  • FIG. 7A is a diagram for explaining the arrangement structure of the pressing sensor according to the second embodiment.
  • FIG. 7B is a partially enlarged plan view of FIG. 7A.
  • 8 (A) to 8 (F) are views for explaining a modified example of the arrangement structure of the pressing sensor according to the second embodiment.
  • FIG. 9 is a diagram for explaining the arrangement structure of the pressing sensor according to the prior art.
  • FIG. 10 is a diagram showing a simulation result of deformation of the housing and each pressing sensor when the side surface of the housing receives a pressing operation in the pressing sensor arrangement structure according to the prior art.
  • FIG. 1 (A) is a perspective view of the electronic device 1 according to the first embodiment
  • FIG. 1 (B) is a cross-sectional view of the electronic device 1 cut along the line II shown in FIG. 1 (A).
  • FIG. 1C is another example of a cross-sectional view of the electronic device 1 cut along the line II shown in FIG. 1A.
  • FIG. 2A is a diagram for explaining the arrangement structure of the pressing sensor according to the first embodiment.
  • FIG. 2B is a partially enlarged plan view of FIG. 2A.
  • FIG. 3 is a diagram for explaining the displacement of the pressing sensor according to the first embodiment.
  • the electronic device 1 has been illustrated, the electronic device 1 is merely an example and is not limited thereto.
  • the width direction (horizontal direction) of the housing 2 will be the X direction
  • the length direction (vertical direction) will be the Y direction
  • the thickness direction will be the Z direction.
  • the electronic device 1 includes a housing 2 having a substantially rectangular parallelepiped shape.
  • the housing 2 includes a side surface 3, a bottom surface 7, and an opening 8. That is, the housing 2 is a so-called bathtub-type structure with an open upper surface.
  • the housing 2 may be a structure in which the lower surface is open instead of the upper surface.
  • the electronic device 1 may have a flat plate-shaped lid 4 in the opening 8, and the lid 4 is located on the upper surface of the housing 2.
  • the Y direction is a direction parallel to the boundary line between the side surface 3 and the bottom surface 7. Further, as shown in FIG.
  • the housing 2 may have a shape in which the upper surface and the lower surface are open, the lid portion 4 is attached to the upper surface, and the lid portion 44 is attached to the lower surface.
  • the bottom surface 7 is formed between the lid 4 and the lid 44.
  • the housing 2 has a button area 5 and a button area 16 on a part of the outside of the side surface 3. Since the button area 16 has the same structure as the button area 5, in the present embodiment, only when the button area 5 receives the pressing operation will be described.
  • the housing 2 may include only one of the button area 5 and the button area 16, and may further provide a button area in addition to the button area 5 and the button area 16.
  • the bottom surface 7 has a first region R1 that is relatively easily displaced when the button region 5 receives a pressing operation, and a second region R2 that is relatively less likely to be displaced than the first region R1. It has a third region R3.
  • the third region R3 is located on the opposite side of the first region R1 from the second region R2. The deformation of the bottom surface 7 when the button region 5 receives the pressing operation will be described in detail later.
  • the slit 20 is not limited to the one that makes the first region R1 of the bottom surface 7 relatively easy to be displaced.
  • a part of the bottom surface 7 may be formed thin or thick.
  • the pressing sensor 11 is arranged so as to straddle the first region R1 and the second region R2.
  • the pressing sensor 12 is arranged so as to straddle the first region R1 and the third region R3.
  • the pressing sensor 11 is an example of the "first pressing sensor” in the present invention
  • the pressing sensor 12 is an example of the "second pressing sensor” in the present invention.
  • the pressing sensor 11 or the pressing sensor 12 is attached to the inside of the housing 2 on the bottom surface 7 with, for example, an adhesive tape or an adhesive. Since the pressing sensor 11 or the pressing sensor 12 is arranged inside the housing 2, the pressing sensor 11 or the pressing sensor 12 cannot be directly touched, so that the durability of the pressing sensor 11 or the pressing sensor 12 is improved.
  • the pressing sensor 11 or the pressing sensor 12 may be arranged on the bottom surface 7 outside the housing 2. When the pressing sensor 11 or the pressing sensor 12 is arranged on the outside of the housing 2, the pressing sensor 11 or the pressing sensor 12 can be easily replaced.
  • the slit 20 is formed on the bottom surface 7.
  • the slit 20 is preferably formed in a portion 21 of the bottom surface 7 between the side surface 3 and the second region R2.
  • the button area 5 on the side surface 3 receives the pressing operation, the side surface 3 is deformed by the pressing operation.
  • the deformation generated on the side surface 3 is transmitted to the bottom surface 7.
  • the deformation transmitted to the bottom surface 7 is greatly deformed to the side surface 3 side by the slit 20 formed in the portion 21.
  • the presence of the slit 20 formed in the portion 21 makes it difficult for the deformation transmitted to the bottom surface 7 to be transmitted to the second region R2.
  • the second region R2 located on the opposite side of the side surface 3 with the slit 20 in between is relatively difficult to displace.
  • the slit 20 is preferably formed in a portion 22 of the bottom surface 7 between the first region R1 and the second region R2.
  • the slit 20 formed in the portion 22 separates the first region R1 and the second region R2. Therefore, the first region R1 and the second region R2 are displaced without being constrained to each other. Therefore, the pressing sensor 11 arranged so as to straddle the first region R1 and the second region R2 can be greatly deformed as compared with the case where the slit 20 is not formed in the portion 22.
  • the slit 20 is preferably formed in a portion 24 of the bottom surface 7 between the first region R1 and the third region R3. Similar to the case where the slit 20 is formed in the portion 22, the slit 20 formed in the portion 24 separates the first region R1 and the third region R3. Therefore, the pressing sensor 12 arranged so as to straddle the first region R1 and the third region R3 can be greatly deformed as compared with the case where the slit 20 is not formed in the portion 24.
  • the slit 20 is further formed in a portion 23 of the bottom surface 7 opposite to the side surface 3 with the first region R1 interposed therebetween.
  • the button region 5 on the side surface 3 receives the pressing operation, the deformation generated on the side surface 3 is transmitted to the first region R1 on the bottom surface 7.
  • a slit 20 exists in the direction opposite to the side surface 3 in the first region R1. Therefore, the first region R1 can be freely displaced toward the portion 23 side. Therefore, the first region R1 is larger than the case where the slit 20 is not formed in the portion 23, and can be displaced in the direction opposite to the side surface 3.
  • the electronic device 1 includes a detection unit (not shown) inside the housing 2.
  • the detection unit is connected to the pressing sensor 11 and the pressing sensor 12, and detects the voltage generated by the pressing sensor 11 and the pressing sensor 12.
  • the pressing sensor 11, the pressing sensor 12, and the detection unit do not necessarily have to be arranged inside the housing 2, but may be arranged outside the housing 2.
  • the configurations of the pressing sensor 11 and the pressing sensor 12 will be described.
  • FIG. 4A is a schematic cross-sectional view of the pressing sensor 11 and the pressing sensor 12 in the YY plane.
  • FIG. 4B is a schematic plan view in an XY plane for explaining the piezoelectric film 30 according to the first embodiment. In FIG. 4B, illustration of the pressing sensor 11 other than the piezoelectric film 30 is omitted.
  • the pressing sensor 11 includes a flat film-shaped first piezoelectric film 31, a first electrode 13, and a ground electrode 15.
  • the pressing sensor 12 includes a flat film-shaped second piezoelectric film 32, a second electrode 14, and a ground electrode 15 common to the pressing sensor 11.
  • the first piezoelectric film 31 and the second piezoelectric film 32 are arranged adjacent to each other in the Y direction on the ground electrode 15.
  • the first electrode 13 is arranged on the first piezoelectric film 31, and the second electrode 14 is arranged on the second piezoelectric film 32.
  • the first electrode 13 is arranged on the first main surface of the first piezoelectric film 31, and the second electrode 14 is arranged on the first main surface of the second piezoelectric film 32.
  • the ground electrode 15 is arranged on the second main surface of the first piezoelectric film 31 and the second piezoelectric film 32. That is, the first piezoelectric film 31 is arranged in the first region R1, and the second piezoelectric film 32 is arranged in the second region R2.
  • the first piezoelectric film 31 and the second piezoelectric film 32 are films formed in a rectangular shape. Although the shapes of the first piezoelectric film 31 and the second piezoelectric film 32 are rectangular, the shapes of the first piezoelectric film 31 and the second piezoelectric film 32 are not limited to this.
  • the first piezoelectric film 31 and the second piezoelectric film 32 are made of a film formed of a chiral polymer.
  • a chiral polymer polylactic acid (PLA), particularly L-type polylactic acid (PLLA), is used in the first embodiment.
  • the main chain of PLLA made of a chiral polymer has a spiral structure.
  • PLLA has piezoelectricity when it is uniaxially stretched and the molecules are oriented. Then, the uniaxially stretched PLLA generates the largest potential when it is deformed in a direction forming an angle of 45 ° with respect to the uniaxially stretched direction. That is, the first piezoelectric film 31 and the second piezoelectric film 32 generate electric charges due to shear distortion.
  • the uniaxial stretching direction of the first piezoelectric film 31 is parallel to the X direction as shown by arrow 901 in FIG. 4 (B).
  • the uniaxial stretching direction of the second piezoelectric film 32 is parallel to the Y direction as shown by arrow 902. That is, the uniaxial stretching direction of the first piezoelectric film 31 is orthogonal to the uniaxial stretching direction of the second piezoelectric film 32.
  • "parallel” means a direction forming an angle of 0 degrees with respect to the X direction or the Y direction. This 0 degree may include an angle including, for example, about 0 degree ⁇ 10 degrees.
  • the polarity is opposite to the potential. That is, the signal generated by the deformation of the first region R1 having the first piezoelectric film 31 has the opposite polarity to the signal generated by the same deformation of the second region R2 having the second piezoelectric film 32. It becomes.
  • the potential generated by the second piezoelectric film 32 is the potential generated by the first piezoelectric film 31. It has the same polarity. That is, when the second piezoelectric film 32 is stretched in a direction tilted by 90 ° with respect to the stretching direction of the first piezoelectric film 31, the potentials generated by the first piezoelectric film 31 and the second piezoelectric film 32 are the same. It becomes the polarity of.
  • first electrode 13, the second electrode 14, and the ground electrode 15 it is preferable to use metal-based electrodes such as aluminum and copper for the first electrode 13, the second electrode 14, and the ground electrode 15.
  • metal-based electrodes such as aluminum and copper
  • the electric charges generated by the first piezoelectric film 31 and the second piezoelectric film 32 can be obtained as their respective potential differences, depending on the amount of deformation.
  • the voltage value detection signal can be output to the outside.
  • FIG. 5 is a diagram showing a simulation result of deformation of the housing 2, the pressing sensor 11, and the pressing sensor 12 when the button area 5 on the side surface 3 of the housing 2 receives the pressing operation.
  • FIG. 10 is a diagram showing a simulation result of deformation of the housing 2 and each pressing sensor when the side surface 3 of the housing 2 receives a pressing operation in the pressing sensor arrangement structure according to the prior art.
  • the housing 2 in the arrangement structure of the pressing sensor according to the prior art has substantially the same configuration as the housing 2 of the present embodiment except that the slit 20 is not formed. That is, the side surface 3 of the housing 2 is thinly formed. 5 and 10 show the magnitude of deformation at each position of the housing 2 in shades of color.
  • the pressing sensor 11 and the pressing sensor 12 are arranged on the bottom surface 7 of the housing 2. Therefore, even if the side surface 3 of the housing 2 is formed thin, it is not necessary to reduce the areas of the pressing sensor 11 and the pressing sensor 12. Therefore, the sensitivity of the pressing sensor 11 and the pressing sensor 12 can be increased by making the areas of the pressing sensor 11 and the pressing sensor 12 a predetermined size.
  • the force applied to the button area 5 by the pressing operation is transmitted from the side surface 3 having the button area 5 to the bottom surface 7.
  • the first region R1 which is relatively easily displaced, is displaced more than the second region R2 or the third region R3 in the direction away from the side surface 3 of the housing 2.
  • the displacement of the second region R2 and the third region R3 in the direction away from the side surface 3 of the housing 2 is smaller than that of the first region R1.
  • the pressing sensor 11 is arranged so as to straddle the first region R1 and the second region R2, so that it faces the second region R2 in the first region R1.
  • a force F1 in the direction away from the housing 2 is applied to the end on the side of the housing 2.
  • a force F2 in the direction opposite to the force F1 is applied to the end of the second region R2 on the side facing the first region R1. Therefore, the pressing sensor 11 arranged so as to straddle the first region R1 and the second region R2 is subject to shear distortion.
  • the pressing sensor 12 is arranged so as to straddle the first region R1 and the third region R3, so that the end of the first region R1 facing the third region R3. Is subject to a force F3 in the direction away from the housing 2. At this time, a force F4 in the direction opposite to the force F3 is applied to the end of the third region R3 on the side facing the first region R1. Therefore, the pressing sensor 12 arranged so as to straddle the first region R1 and the third region R3 is subject to shear distortion. In the pressing sensor 11 and the pressing sensor 12, a shear distortion symmetrical with respect to the first region R1 occurs. As a result, the pressing sensor 11 and the pressing sensor 12 can each detect the signal generated by the shear distortion.
  • the first piezoelectric film 31 of the pressing sensor 11 is distorted symmetrically with respect to the second piezoelectric film 32 of the pressing sensor 12 and the first region R1. That is, the direction of the shear strain generated by the first piezoelectric film 31 and the shear strain generated by the second piezoelectric film 32 are opposite.
  • the uniaxial stretching direction of the first piezoelectric film 31 is orthogonal to the uniaxial stretching direction of the second piezoelectric film 32. Therefore, the potentials generated by the first piezoelectric film 31 and the second piezoelectric film 32 have the same polarity. Therefore, a larger potential can be obtained by adding up the potentials generated by the first piezoelectric film 31 and the second piezoelectric film 32.
  • the second piezoelectric film 32 may be PDLA.
  • the uniaxial stretching direction of the second piezoelectric film 32 is parallel to the Y direction as in the first piezoelectric film 31.
  • first piezoelectric film 31 and the second piezoelectric film 32 are used in the present embodiment, only one first piezoelectric film 31 may be used.
  • the first electrode 13 is arranged on the main surface opposite the first piezoelectric film 31 with respect to the second electrode 14.
  • a specification may be used in which one side of the obtained potential is inverted and added.
  • any configuration is adopted as long as the potentials detected by the first piezoelectric film 31 and the second piezoelectric film 32 are added without being canceled.
  • the shape of the housing 2 is not limited to this.
  • examples of the shape of the housing 2 include other shapes such as a cylinder, a polygonal prism, a sphere, and a polygonal pyramid.
  • the housing 2 may have a rectangular parallelepiped shape with chamfered corners.
  • the electronic device 1 is not limited to the communication device as shown in FIG. 1 (A), and is also adopted for, for example, an operating device such as a controller and a remote controller. obtain.
  • 6 (A) to 6 (C) are diagrams for explaining modified examples 1 to 3 of the arrangement structure of the pressing sensor according to the first embodiment.
  • 6 (A) to 6 (C) are plan views in the XY directions, and show only the periphery of the pressing sensor.
  • the modified examples 1 to 3 only the part different from the arrangement structure of the pressing sensor according to the first embodiment will be described, and the rest will be omitted.
  • FIG. 6A shows a modification 1.
  • the slit 61 is formed on the bottom surface 7.
  • the slit 61 is formed only in a portion corresponding to the first region R1 and the second region R2. That is, the slit 61 is not formed between the portion 24 between the first region R1 and the third region R3 and between the side surface 3 and the third region R3. Therefore, the slit 61 can be formed more easily.
  • the modification 1 does not need to have a configuration for adding potentials. Further, since only the pressing sensor 11 is sufficient, the sensor arrangement can be simple. In addition, in the modification 1, either one of the pressing sensor 11 and the pressing sensor 12 may be arranged. When only the pressing sensor 12 is arranged, the pressing sensor 12 is arranged so as to straddle the first region R1 and the third region R3 shown in FIG. 2B, for example. This also has the same effect.
  • FIG. 6B shows a modification 2.
  • the slit 62 is formed on the bottom surface 7.
  • the slit 62 is different from the slit 61 of the first modification in that the slit 20 is not formed in the portion 23.
  • the slit 62 has a simpler shape and is easily formed.
  • the slit 62 is filled with a filler 64.
  • the filler 64 is made of a material softer than the housing 2. Since the slit 62 is filled with the filler 64, it is possible to prevent a failure or malfunction due to dust or the like entering the slit 62.
  • FIG. 6C shows a modification 3.
  • a pair of slits 65, a slit 66, and a slit 67 are formed on the bottom surface 7.
  • the slit 65 is formed in a portion 21 between the side surface 3 and the first region R1.
  • the slit 66 is formed in a portion 25 between the side surface 3 and the third region R3. That is, the slit 65 is formed at a position corresponding to the second region R2, and the slit 66 is formed at a position corresponding to the third region R3.
  • the slit 65 is not continuous with the slit 66, but is formed on the opposite side of the side surface 3 with the first region R1 of the bottom surface 7 interposed therebetween. Since the slit 65, the slit 66, and the slit 67 have a simple shape, they are easy to form.
  • FIG. 7A is a diagram for explaining the arrangement structure of the pressing sensor according to the second embodiment.
  • FIG. 7B is a partially enlarged plan view of FIG. 7A.
  • the strain gauge 71 is used instead of the pressing sensor 11 or the pressing sensor 12, and the arrangement of the strain gauge 71 is significantly different from that of the first embodiment, and the rest is the same configuration as that of the first embodiment. Therefore, only the different parts will be described, and the rest will be omitted.
  • the bottom surface 7 has a first region R11 and a second region R12.
  • the first region R11 is closer to the side surface 3 than the slit 20.
  • the second region R12 is on the opposite side of the side surface 3 with the slit 20 in between.
  • a slit 20 is formed between the side surface 3 and the second region R12. Deformation due to the pressing operation is suppressed from being transmitted to the second region R12 by the slit 20.
  • the first region R11 is more easily displaced than the second region R12, and the second region R12 is relatively less likely to be displaced than the first region R11.
  • the strain gauge 71 is arranged so as to straddle the first region R11 and the second region R12. That is, the strain gauge 71 is arranged so as to straddle the slit 20.
  • the strain gauge 71 is attached to the bottom surface 7 in parallel along the X direction.
  • the strain gauge 71 is arranged so as to straddle the portion 23, but the strain gauge 71 is not limited to this.
  • the button region 5 When the button region 5 receives a pressing operation, the first region R11, which is relatively easily displaced, is displaced more than the second region R12 in the direction away from the side surface 3 of the housing 2. At this time, it is difficult for the force due to the pressing operation to be transmitted to the second region R12 separated from the side surface 3 by the slit 20. Therefore, the displacement of the second region R12 in the direction away from the side surface 3 of the housing 2 is smaller than that of the first region R11. As a result, the distance between the first region R11 and the second region R12 is shortened.
  • the strain gauge 71 When the strain gauge 71 is expanded and contracted in the arrow direction (X direction) shown in the strain gauge 71 of FIG. 7B, the resistance changes according to the degree of expansion and contraction of the strain gauge 71.
  • the strain gauge 71 outputs a change in resistance.
  • the strain gauge 71 contracts in the X direction. Therefore, the strain gauge 71 can detect that the button region 5 has received the pressing operation.
  • the slit 20 has a shape in which a part of the slit 20 projects toward the side away from the side surface 3, but the slit 20 is not limited to this.
  • the slit 20 may be a straight line parallel to the Y direction, or may have a curved shape in a portion protruding toward the side away from the side surface 3.
  • 8 (A) to 8 (F) are diagrams for explaining modified examples 4 to 9 of the arrangement structure of the pressing sensor according to the second embodiment, respectively.
  • 8 (A) to 8 (F) are plan views in the XY directions, and show only the periphery of the pressing sensor.
  • the strain gauges 72 to 75 are the same as the strain gauges 71.
  • FIG. 8A shows a modification 4.
  • the strain gauge 72 is attached to the bottom surface 7 along a direction inclined 45 ° counterclockwise with respect to the X direction.
  • the strain gauge 72 can detect the contraction in the direction tilted 45 ° counterclockwise with respect to the X direction.
  • FIG. 8B shows a modified example 5.
  • the modified example 5 is a modified example 4 in which a strain gauge 73 is further added.
  • the strain gauge 73 is attached to the bottom surface 7 along a direction inclined 45 ° clockwise with respect to the X direction.
  • the strain gauge 72 contracts in a direction tilted 45 ° counterclockwise with respect to the X direction, and the strain gauge 73 rotates 45 ° clockwise with respect to the X direction. It is possible to detect shrinkage in the tilted direction.
  • FIG. 8C shows a modification 6.
  • Modification 6 is a second embodiment to which a strain gauge 74 is further added.
  • the strain gauge 74 is arranged so as to straddle the slit 20 along a direction parallel to the Y direction.
  • the strain gauge 71 can detect the shrinkage in the direction parallel to the X direction
  • the strain gauge 73 can detect the shrinkage in the direction parallel to the Y direction. ..
  • FIG. 8D shows a modified example 7.
  • the modified example 7 is obtained by further adding a strain gauge 75 to the modified example 6. Similar to the strain gauge 74, the strain gauge 75 is arranged so as to straddle the slit 20 along a direction parallel to the Y direction. The strain gauge 75 is attached to the bottom surface 7 symmetrically with respect to the strain gauge 74 with respect to the first region R11. As a result, when the button region 5 accepts the pressing operation, the strain gauge 75 can detect the contraction in the direction parallel to the Y direction in addition to the strain gauge 71 and the strain gauge 74.
  • FIG. 8 (E) shows a modified example 8.
  • the modified example 8 is a modified example 6 in which a strain gauge 72 is further added.
  • the strain gauge 72 can detect shrinkage in a direction tilted 45 ° counterclockwise with respect to the X direction. it can.
  • FIG. 8 (F) shows a modified example 9.
  • the modified example 9 is a modified example 7 to which a strain gauge 72 and a strain gauge 73 are further added.
  • the strain gauge 72 contracts in a direction tilted 45 ° counterclockwise with respect to the X direction.
  • the strain gauge 73 can detect shrinkage in a direction tilted 45 ° clockwise with respect to the X direction.

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PCT/JP2019/044798 2019-03-29 2019-11-15 押圧センサの配置構造及び電子機器 WO2020202631A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201980052251.5A CN112534229B (zh) 2019-03-29 2019-11-15 按压传感器的配置构造和电子设备
JP2020517606A JP6737426B1 (ja) 2019-03-29 2019-11-15 押圧センサの配置構造及び電子機器
US16/922,342 US11930712B2 (en) 2019-03-29 2020-07-07 Arrangement structure of press sensor and electronic device

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Application Number Priority Date Filing Date Title
JP2019065235 2019-03-29
JP2019-065235 2019-03-29

Related Child Applications (1)

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US16/922,342 Continuation US11930712B2 (en) 2019-03-29 2020-07-07 Arrangement structure of press sensor and electronic device

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WO2020202631A1 true WO2020202631A1 (ja) 2020-10-08

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